Thanks. That's all I was looking for, though I'm not sure the attendance differences are great enough to lend much credence to the argument that the UND-DU hockey rivalry would make the Big Sky more likely to add the two schools as a package deal.
In the end, college presidents make the final decision on expansion, and college presidents still like to look at such things as travel costs, airport connections, flight schedules, etc. As much as I would like to see it, I don't think the Big Sky will add UND. At some point, you have to take peope at their word, and Fullerton has said more than once that the Big Sky is not looking eastward. My guess is if the Big Sky does expand, it goes after British Columbia (assuming the NCAA gives the OK). UBC fits the model for recent Big Sky expansions -- it's in a large metro area and within (to use an overused phrase) the conference's geographic footprint.
Given the news out of Fargo and Brookings today, I suspect UND will be playing football in a seven- to eight-member Great West conference in two or three years and in an expanded or reconfigured Mid-Continent Conference for other sports in six or seven years.